<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div onclick="clickMe()">点我啊！！！</div>
  <script>
    function clickMe() {
      alert('我被点击了')
      // console.log(123);
    }
  </script>
</body>

</html>